// 下拉菜单
// 下拉菜单 E
// 导航B
function one(){
    var c1=document.getElementById("c1");
    var c2=document.getElementById("c2");
    c1.style.display='';
    c2.style.display='none';
}
function nine(){
    var c1=document.getElementById("c1");
    var c2=document.getElementById("c2");
    c1.style.display='none';
    c2.style.display='';
}
function neirong(){
    var x1=document.getElementById("d1");
    var x2=document.getElementById("d2");
    var x3=document.getElementById("d3");
    var x4=document.getElementById("d4");
    x1.style.display='';
    x2.style.display='none';
    x3.style.display='none';
    x4.style.display='none';
}
function shiyan(){
    var x1=document.getElementById("d1");
    var x2=document.getElementById("d2");
    var x3=document.getElementById("d3");
    var x4=document.getElementById("d4");
    x1.style.display='none';
    x2.style.display='';
    x3.style.display='none';
    x4.style.display='none';
}
function fangfa(){
    var x1=document.getElementById("d1");
    var x2=document.getElementById("d2");
    var x3=document.getElementById("d3");
    var x4=document.getElementById("d4");
    x1.style.display='none';
    x2.style.display='none';
    x3.style.display='';
    x4.style.display='none';
}
function tuijian(){
    var x1=document.getElementById("d1");
    var x2=document.getElementById("d2");
    var x3=document.getElementById("d3");
    var x4=document.getElementById("d4");
    x1.style.display='none';
    x2.style.display='none';
    x3.style.display='none';
    x4.style.display='';
}
